How Do You Explain This Persistent Red Spot?
1 Question
| Attempts: 51
By DAVID L. KAPLAN, MD — Series Editor — University of Missouri Kansas City, University of Kansas | August 3, 2010 Dr Kaplan is clinical assistant professor of dermatology at the University of Missouri Kansas City School of Medicine and at the University of Kansas School of Medicine. He practices adult and pediatric dermatology in Overland Park, Kan.
Questions and Answers
- 1.
During a routine checkup, a 14-year-old girl inquires about a large red spot on her right ankle. The asymptomatic, erythematous area overlying the malleolus has been present for several months.
- A.
Psoriasis.
- B.
Dermatomyositis.
- C.
Dermatophyte infection.
- D.
Trauma.
- E.
Gout.
Correct Answer
D. Trauma.Explanation
In-depth questioning of the patient revealed that she habitually curled her leg under her thigh when seated; this position caused both pressure and frictional irritation to the malleolus, D. A single affected spot ruled out psoriasis and dermatomyositis; the potassium hydroxide evaluation was negative for a dermatophyte infection. This patient was too young to have gout.
Reassurance and a suggested alternative sitting position were the only treatments necessary.Rate this question:
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Jul 30, 2011Quiz Edited by
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Sep 22, 2010Quiz Created by
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